Protocol re: peg tubes

State is coming in for our routine survey and we were told to make sure that we know everything about peg tubes re: checking for placement and residual. If I remember correctly you put in 30 cc of air and listen. As far as checking residual its over 100cc that is bad,correct. Always put back in residual, correct? How much do you flush with prior to administer meds? I've read several different amounts, I do 30cc. We are allowed to give all meds together unless contraindicated. If anyone can give me a website with any information that would be wonderful. We do not have a standard policy re: peg tubes. I want to be prepared. I know there is the school way and then the real way and some ways in between. Any information would be greatly appreciated. Some of these questions may make me sound like an idiot, but actually I'm not, I'm just wanting some clarification. Thanks in advance.....